Circuit Break is a Booster Pack in the Yu-Gi-Oh! Official Card Game (OCG) and Yu-Gi-Oh! Trading Card Game (TCG). It is the second set in the OCG's 10th series This set contains contains members/support for: "Abyss-", "Bamboo Sword", "Cyber", "Fire King", "Fire King Avatar", "Gouki", "Nimble", "Mecha Phantom Beast", "Mermail", "Ojama", "Phantom Beast", "Trickstar", and "World Legacy". Three new archetypes: "Altergeist", "Krawler", "Rokket" were introduced. It also introduces the first support for the "Metaphys" archetypes.